Electric heater, (electrolytic type).



G. SHARPNACK (Y: T. J. NASH.

ELECTRIC HEATER (ELECTROLYTIC TYPE).

APPLICATION FILED MAR. 27. 1916.

1,205,57 l Patented Nova 21, 1916.

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Patented. Nova 21, 1916.

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UNITED STATES PATENT OFFICE.

. GEORGE SH ARPNACK THOMAS J. NASH, OF LINCOLN, NEBRASKA, ASSIGNORS OF ONE-HALF TO GEORGE P. ELMEN, ONE-FOURTH ONE-FOURTH T ADOLPHUS R. TALBOT, ALL 02 TO STEPHEN O. SALISBURY, AND LINCOLN, NEBRASKA.v

-- ELECTRIC HEATER, (ELECTROLYTIC TYPE.)

Specification of Letters Patent. Patented N 21 1916 l Application filed March 27, 1916. Serial No. 87,071.

To all whom it may concern:

Be it known that we, Grouse SuARrNAoK. and THOMAS J. NAsH, residing at Lincoln, 111

the county of Lancaster .and State of Nobraska, have invented certain new and' use iul Improvements in Electric Heaters, (Electrolytic Type,'). of which the following is a specification.

r This invention relates to certain new and useful improvements in electric heaters of the electrolytic-type, such as is shown, for instance, in'the patent grantedto Thomas J. Nash, March 23, 1915, bio-1,132,604, the

said invention being a, modification of 'the heater therein shown and descr1bed,"adapting the same especially for use in connection 'Wlth internal combustion engines to maintam the temperatureof the circulating water inthe water jacket above the freezin'g point.

he present. invention particularly has, for itsobject to provide such a device of a simple and effective construction, in which the parts are compactlyv arranged .and which can be manufacturedat'a minimum expensel In the genericnatur'e, the invention comprises a plug adapted to be tapped into .the water reservoir from which plug one of the water passages, the other electrodes being located within the fixed electrode, but spaced from and insulated from thesame, and from the plug by an insulating medium, one portion at least ofwhich is compressible to forma packingaround the stem of the sec 0nd electrode, which stem projects through the plug to the outsideof the same and is designed to serve" as a circuit terminal to which one of the current feed wires may be all of which will be first fully described,

Figure 1 is a horizontal section of a" or;

away and other parts being shown neleva- The'electrode I is provided with water electrodes projects inwardly,- the electrode beingtubular in. form and provided with "portion mg the upper end of the tion) of the device, per se. "Fig. 3 is an inverted plan view of the same. Fig. 4 is a top plan VIEW-0f the device. Fig. 5.is a

sectional perspective view of the'plug'and electrode member. Fig'. 6 is a sideflelevation of the modification of the invention designed especially for use for heating water in boilers and radiators. Fig. 7 is a central vertical longitudinal section of the form v shown in Fig. .6.

.In the drawing, in which like numerals of the water jacket of the engine. The plug arts'in all of the the threaded projection I be tapped into the wall is bored at 4 and counterbored at 3 to leave a flange 5 for a purpose presentlyunderstood, and-below the flange 5 a tubular elecvtrode 6 is pro ected. This electrode may be integral Wlllhl the plug-or made separately therefrom and secured to the plug by soldering, brazindg or otherWell-known means,

so as to provi a good electric engagement. 6 is tubular in nature and has itslower end open and near its upper end circulating passages 7. The flange l ofthe plug is bored and tappedat 8'to receive a termlnal screw 9 to which one'of the circuit terminals23 fromthe switch 26 and the source of current supply- -(not ishown), is connec'ted, as will be 7 rleadily understood by those. skilled in .t e art.--..".- v v l0 designates a compressibletubularbody inade of rubber and fabric in the well-known hose pipe form, which is designed to fit I into the counterbore 3 and base reduced 11 to fit 'in'thefboree. "Surround resilient. ,a'cking 10, which projects above the plug fl is a ha'rdrubber' ring 18,. the ring l8=being 'tig'htlyheld inplace when the packing 10 is compressed by takingfup; on the "nut 20 then be specifically poiiitedout'in the ap-=- pended claims and illustrated inthe accon 1 v panying'drawings,in which thatfenga'ges the washer 19 10111 thejbolt 12.

The bolt 12. projects through" the"packing {10- and'at' its 'otherfend'hasa head-I13 against which'a washer 14 is seated to holdthe'inner electrode 15 in place,'thef inner ing preferably constructed at carbon-and in sulated from the -plu g".by'a1disk, 1650f slate 3 or' otherisuitable material which-is set into f. 'j the recess.

electrode'l beange l,

The upper end of the bolt or rod 12 is provided to receive the nut 20, and washers 21 and a thumb nut 22 is provided for clamping the other terminal wire into electrical engagement with the rod, it being understood that the thumb nut 22 is preferably formed of hard rubber or other insulating substance, the provision of the hard rubber parts 18 and 22 allows the plug to be handled without danger of burning the fingers and also provides eiiective insulation.

The engine is indicated by the reference character 24 and 25 is the dash of the mo to-r vehicle on which the switch 26 is mounted when the invention is employed in connection with an automobile engine. It should be understood that the invention is not only adapted for internal combustion engines of the motor vehicle type but may be, used as well onstationary engines or at any other place where it may be needed for the purpose of raising the temperature of the water.

In Figs. 6 and 7 is shown a modification of the invention especially designed for use in heating water in boilers, radiators or other fluid reservoirs, it being understood that the invention is intended for use where ever'it is desired to heat Water in a boiler, radiator, reservoir, or other container, and the length of the electrodes may be varied to suit the requirements of the particular situation.

If desired, instead of providing the bolt 12 with an integral head 13, as shown in Fig. 2, the outer end of the bolt may be threaded at 28 and provided with a nut 29 to engage the washer 14 and a disk 27 may be provided to close off the end of the outer electrode 6 to prevent access of foreign matters should the heater be pushed into the same while inserting it into a boiler.

In order that scale and other foreign substances may not enter the apertures 7 and short-circuit the electrodes, we prefer to inclose the outer electrode in a screen shell 30 of such mesh as will prevent the entrance of the scale, etc., into the space between the electrodes 6'and 15.

From the foregoing description, taken in connection'with the accompanying drawings, it is thought the complete construction, operation and advantages of our invention will be readily understood by those skilled in the art. What we claim is: 1. A heater comprising a plug having a threaded portion, anelectrode projecting from said threaded portion, said plug having a bore-provided with a recess, a second electrode, a rod clampingsaid second electrode to said plug, means for insulating said second electrode from said plug, a compressible insulating packing in said recess and a nut device on/said rod and-engaging said. packing for compressing the same.

2. A heater comprising a plug havlng a threaded portion, an electrode projecting shown and described.

3. A heater of the class described comprising a plug having a threaded portion and a nut portion, said plug havinga recess in one face and a bore through the same, a disk of insulating material held in said recess, an inner electrode, a rod on which said inner electrode is carried, said rod projecting through said insulating disk and through said plug bore, a compressible tubular packing member around said rod in said bore, and means for securing said rod and packing in place, and a tubular electrode projecting from said plug around said inner electrode and spaced from the same, said tubular electrode having water circulating passages.

4. A heater of the class described comprising a plug having a threaded portion and a nut portion, said plug having a recess in one face and a bore through the same, a disk of insulating material held in said recess, an inner electrode, a rod on which said inner electrode is carried, said rod projecting through said insulating disk and through said plug bore, a compressible tubular packing member surrounding said rod in said bore, and means for securing said rod and packing in place, a tubular electrode projecting from said plug around said inner electrode and spaced from the same,

said tubular electrode having water circulating passages, said compressible packing projecting beyond the face of the nut portion of said plug and a hard rubber ring encircling said projecting portion in said packing, substantially as shown and described.

5. A Water heater comprising a plug, said plug having a bore provided with a recess, a tubular electrode attached to said plug and projecting therefrom, an inner electrode disposed Within said tubular electrode, an insulating disk in said plug recess, a rod passing through said inner electrode, said disk and said plug borefor sustaining said inner electrode, means for electrically insulating said rod and for eifecting a water-tight" closure between said rod and said plug.

6. A water heater comprising a plug, said 3 plushaving a bore provided with arecess,

L w 1 in electrode attached to said plug therefrom, an inner electrode ecu Within said tubular electrode, an insulating disk in said recess, a rod passing through said inner electrode, said disk, and said plug bore for sustaining said inner elecode, means for electrically insulating said rod and for effecting a Water-tight closure etoeen said rod and said plug, said last l means comprising a compressible insul; packing located Within said plug bore, means cooperative- With said rod for app :,-"l11g compression strains to said pack ing tor the purposes stated.

T. A Water heater comprising a plug, said g havin a bore'provided with a recess, a ular electrode attached to said plug and irojecting therefrom, an inner electrode dis- ;osed Within said tubular electrode, an indo. disk said plug recess, a rod passti il said plug bore for sustaining said inner e ectrode, means for electrically insulating rod and for effecting a Water-tight c sure between said rod and said plug, said tubular electrode being perforated, the outer end of said tubular electrode being open, a disk of insulating material on said rod fitted Within said tubular electrode to form an end closure for the same, said tubular electrode extending beyond the end of said rod.

8. A water heater comprising a plug, said plug having a bore provided with a recess, a tubular electrode attached to said plug and projecting therefrom, an' inner electrode H.111 ,m, A 5 .a

disposed Within said tubular electrode, an insulating disk in said recess, a rod passing through said inner electrode, said disk, and

l irough said inner electrode, said disk,

said plug bore for sustaining said inn trode, means for electrically insul rod and for etl'ecting a I between said rod and said plug, said last named means comprising a compressible it sulating packing located within said o bore means cooperative with rod ,3 applying compression strains to said DRCPF ing for the purpose stated, said tubular elect-rode being perforat d', outer end of said tubular electrode being open, a disk of insulating material on said rod fitted Witnin said tubular electrode to form an e d closure for the same, said tubular electi extending beyond the end of said rod.

9. A water heater comprising a plug, sai plug having a. bore provided with a recess, tubular electrode attached to said plug projecting therefrom, an inner ele *trode posed Within said tubular electrode, an sulating disk in said plug recess, a rod ing through said inner electrode, said and said plug bore for sustaining said i electrode, means for elec Water-t rricall said rod and for effecting a a1 closure between said rod and said pl tubular electrode being perforated, L- i end or" said tubular electrode being open, a disk of insulating material on said Within said tubular electrode to form an closure for the same, said tubular electrodes; extending beyond the end or said rod, a d

a screen fabric member fitted onto said 0 electrode to inclose the same, sail s fabric extending across the open tubular electrode, substantiall and described. 

